Dental appliance.



P. S. WHITNEY & R. R. MYERS.

DENTAL APPLIANDE.

APPLIUA'IION FILED APB. 29,1aoa.

908,056. Patented Dec. 29, 1908.

WITNESSES: IN V/LyZNORS P 6. a) i may AW W IF. iam em I ATTORNEY.

UNITED STATES PATENT OFFICE.

PRESTON S. WHITNEY AND ROBERT R. MYERS, OF FAIRBANKS, DISTRICT OF ALASKA.

DENTAL APPLIANCE.

Specification of Letters Patent.

Application filed April 29, 1908.

Patented Dec. 29, 1908.

Serial No. 429,987.

To all whom it may concern:

Be it known that we, PRESTON S. VVHIT- NEY and ROBERT E. MYERS, citizens of the United States, residing at Fairbanks, Alaska, have invented certain new and useful Improvements in Dental Appliances, of which the following is a specification, reference being had therein to the accompanying drawmgs.

This invention relates to dental appliances; and its object is the provision of a simple and efficient device for punching holes in the sheet metal backing of toothparts of porcelain or analo ous material and also for swaging the bac 'ing to make the same conform to the underside of such parts.

With these ends in view the invention consists in the novel arrangement and adap tation of arts, as will be hereinafter described an claimed.

In the drawings, Figure 1 is a side elevation of devices embodying our invention; Fig. 2 is a longitudinal vertical section of a ortion of the same with the block adjusted or the punching operation; and Fig. 3 is a view similar to Fig. 2 with the block reversed for swaging pur oses. Fig. 4 is a pers ective view of t e block shown detac ed. Figs. 5 and 6, respectively, are erspective views of a tooth and of a blank or backing the same. Figs. 7 and 8 are side elevations of a tooth facing and connected backing therefor as produced by the punch and swage o erations. In Figs. 2 and 3 the .work is s own in osition as corn leted by each of the operations for which t e block is respectively set.

The reference numeral 10 designates the handles of a forceps-like implement which are fulcrumed at 11 and are provided with 'aw-members l2 and 13. The member 12 is ifurcated to provide arms 12 to support a transversely arranged pin 14 u on which is tiltably mounted a box 15. T 's box is recessed upon two opposite sides to furnish receptacles 15 and 15" for facings of rubber, or other suitable yielding material. The facing 16 is of a relatively hard material, such as sheet rubber employed in the manufacture of gaskets, while the other 16 is of a softer com osition, such as vulcanite. The face of t e jaw 13, which opposes the block 15, is recessed to afford a cavity 13 for the reception of a relatively hard rubber facing 17 like that em loyed in the recegtacle 15. All of these acings are, desira 1y,

backing piece of sheet metal B, such as annealed gold or platinum, large enough to cover the under side of the tooth is now laid upon the block facing 16 when the latter is opposite the aw 13; the tooth held between t e thumb and index finger of the operators left hand is then inserted between the jaws in such manner that the tooth pins will be directed toward and be about central of the backing. By manipulating the handles 10 with the right hand the jaws are closed upon the tooth forcing the pins through the backing and into the facing under the latter. The jaws are then opened and the tooth and connected backing removed together. After reversin the block to present the facing 16 the toot and backin are placed upon this facing and pressed y hand to insert the tooth points thereinto. A pressure now put upon the implement handles will serve to close the jaws upon the tooth and embed the tooth and its hacking into this facing, as re resented in Fig. 3, and thus swage the bac ing into intimate relation with the under side of the tooth. After removing the work the edges of the backing are trimmed and with a suitable hand tool, are burnished about the periphery.

Among the advantageous functions of this invention are the punching of the tooth pins directly into the backing, insuring a tight oint t erebetween to prevent solder or flux, in after operations, from coming into contact with the porcelain part; in embeddin the Work in the resilient cushion the bac ing is affected to swage the same in to a most intimate juxtaposition with the bottom of the tooth throughout its entire surface. The employment of the rubber facings 1 6 and 17 furnish cushionlike supports for the work, while the other 16 yields to allow the tooth to embed therein, and thus not only serve the purpose intended and above noted but without rendering the work liable to inury.

Having described our invention, what we claim, is

1. In apparatus of the class described, the combination with pivotally connected forceps members, a block ivotally connected to one of the jaws, said bl bck being provided with recesses in two of its op osite sides, and facings of yielding materia seated in the aforesaid recesses, substantially as and for the purposes described.

2. In apparatus of the class described, the combination, with pivotally connected forceps members having a recess formed in one of the jaws and the other jaw bifurcated, a block pivotally connected to the last named jaw, said block being provided with recesses in two of its opposite sides, and facings of yielding material seated in the several aforesaid recesses, substantially as and for the purposes described.

3. The combination with the forceps members, of a jaw formed integral with one of theforceps members, a block pivotally 4 connected wlth the jaw of the other member,

and facings of yielding material provided for the first named jaw and also for the opposite sides of the block, substantially as and for the purposes described.

In testimony whereof we affix our signatures in presence of two witnesses.

PRESTON S. WHITNEY. ROBERT R. MYERS.

Witnesses Ci-iAs. W. KOEGLEY, HARRY BUKRO. 

